Traps can be made tunable to a small extent.? The real question is tuning range and how to tune them accurately.? For fixed frequency traps the result can be
good, and some can be made wider at the expense of less attenuation.? LC and R
values can be adjusted for best performance, but it is not an easy thing to do.?
After deciding on best values using a simulator, they still need to be tuned using
a spectrum analyzer to insure that they are where then need to be.?
My exploration of traps and LPF enhancements was just that...exploration, with the
hope that some of my results might stimulate others to try similar ideas.?
On Tue, Sep 4, 2018 at 8:33 PM James Lynes <jmlynesjr@...> wrote:
It's crude, but you could treat the upper bands like a series of rock bound transmitters with a narrow tuning range(around the qrp calling frenquency, for example) and build the traps accordingly.?
